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Title: DIRTY AGGREGATE, WHAT DIFFERENCE DOES IT MAKE?
Accession Number: 00217752
Record Type: Component
Abstract: THE EFFECTS OF CLAY IN CONCRETE FINE AGGREGATE ON THE PROPERTIES OF CONCRETE ARE PRESENTED AND DISCUSSED. THE TWO MOST GENERALLY USED TESTS, THE LOSS BY DECANTATION AND SAND EQUIVALENT TESTS, ARE EXAMINED. THE ABILITY OF THESE TESTS TO MEASURE THE OBSERVED EFFECTS OF THE CLAY FRACTION OF AN AGGREGATE ON THE PROPERTIES OF CONCRETE IS ILLUSTRATED. THE CONCRETE PROPERTIES UNDER STUDY WERE WATER REQUIREMENT, STRENGTH, SHRINKAGE AND FREEZE-THAW DURABILITY. BOTH THE QUANTITY AND ACTIVITY OF THE CLAY FRACTION WERE FOUND TO BE INFLUENTIAL. INCREASES IN QUANTITY AND ACTIVITY OF CLAY CAUSE INCREASES IN WATER REQUIREMENT AND SHRINKAGE AND DECREASES IN STRENGTH AND DURABILITY. BECAUSE OF THE INFLUENCE OF THE ACTIVITY OF THE CLAY FRACTION, THE SAND EQUIVALENT TEST IS THE BETTER INDICATOR OF THE EFFECT ON CONCRETE OF THE CLAY FRACTION OF AN AGGREGATE. /AUTHOR/
Supplemental Notes: Paper sponsored by Committee on Mineral Aggregates and presented at the 47th Annual Meeting. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
Monograph Title: Monograph Accession #: 01410172
Authors: Buth, EugeneIvey, Don LHirsch, Teddy JPagination: pp 26-34
Publication Date: 1968
Serial: Media Type: Print
Features: Figures
(9)
; References
(6)
; Tables
(7)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Geotechnology; Highways; Materials
Files: TRIS, TRB
Created Date: Sep 12 1994 12:00AM
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